/Engine/Source/Runtime/Engine/Classes/Components/InstancedStaticMeshComponent.h
The transform should be in the local space of the owner ISM component, unless bWorldSpace is set.
True if the transform was updated, false otherwise.
virtual bool SetSMInstanceTransform ( const [FSMInstanceId](API\Runtime\Engine\Elements\SMInstance\FSMInstanceId) & InstanceId, const FTransform & InstanceTransform, bool bWorldSpace, bool bMarkRenderStateDirty, bool bTeleport )